Slime Mold Simulation

Here's a paper on the subject.

https://uwe-repository.worktribe.com/output/980579

It makes evolving patterns and you can set mold 'colonies' against each other to compete for resources.

Sebastian Lague has a lovely video on his experiments with them and their similarities with ant colony food source locating algorithms.

https://www.youtube.com/watch?v=X-iSQQgOd1A

Perhaps it would be a good follow-up to a travelling salesperson refresher video.